2005 Asia-Pacific Conference on Communications最新文献_第3页

Receiver Initiated Network Allocation Vector Clearing Method in WLANs 无线局域网中接收机发起的网络分配矢量清除方法

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554135

Lei Du, Lan Chen

{"title":"Receiver Initiated Network Allocation Vector Clearing Method in WLANs","authors":"Lei Du, Lan Chen","doi":"10.1109/APCC.2005.1554135","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554135","url":null,"abstract":"802.11 DCF defines a virtual carrier sense mechanism, via RTS/CTS handshaking, to reserve wireless channel. All the nodes overhearing either RTS or CTS set their network allocation vector (NAV) respectively, and defer the channel access for the expected time to finish the packet sequence transmission. The problems arise when RTS or CTS is not successfully received by the addressed node, which causes the channel waste resulted from unnecessary NAV setting. We specify them as RTS-induced and CTS-induced unnecessary NAV setting problems depending on the type of the packet where NAV is set from. Some literatures resolve the problem by channel sensing, though, they are focusing on RTS-induced problems, and infeasible in CTS-induced case due to the unavailability of transmission status at those nodes surrounding the destination. Besides, taking into consideration the path loss, multipath fading, movement, etc., the packet error rate of CTS becomes severe in wireless propagation environment. Therefore, it is necessary to resolve the CTS-induced problem as well. To this end we propose the receiver initiated NAV clearing (RINC) method to enhance the system performance. The method aims to notify surrounding nodes the transmission status via a clear packet initiated from the receiver. It eliminates the wasted inhibition period in case of broken sequence without interfering with ongoing transmissions. This paper first describes the unnecessary NAV setting problems and further illustrates the MAC operation of the proposed idea. After that, the performance in terms of throughput, average delay, etc. is evaluated by simulation. It is observed that the proposed method enhanced the throughput by utilizing the channel in a more efficient way","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133160345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

A New Packet Loss-Resilient Duplicated Video Transmission 一种新的抗丢包的重复视频传输

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554227

M. Seo, Yo-Won Jeong, Jae-Kyoon Kim, K. Park

引用次数: 2

Congestion Avoidance Using DYnamic COdec MAnagement: A solution for ISP 利用动态编解码器管理避免拥塞:一种针对ISP的解决方案

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554190

L. Alcuri, F. Saitta, M. Fasciana

引用次数: 1

Congestion Management of Self Similar IP Traffic using Probability based Normal and Exponential marking RED 基于概率法和指数标记RED的自相似IP流量拥塞管理

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554087

S. Suresh, O. Gol

引用次数: 2

A Super-Peer based Method to Discover QoS Enhanced Alternate Paths 一种基于超级对等体的QoS增强备用路径发现方法

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554100

T. Rakotoarivelo, P. Sénac, A. Seneviratne, M. Diaz

引用次数: 4

Distributed and Load-Adaptive Self Configuration in Sensor Networks 传感器网络中的分布式和负载自适应自配置

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554122

M. Iqbal, I. Gondal, L. Dooley

引用次数: 3

Multipath Delay Estimation for a MIMO-OFDM System MIMO-OFDM系统的多径时延估计

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554024

Jie Bai, Jianhua Zhang, Ruoju Liu, Xueqi He, Ping Zhang

引用次数: 1

Lower-Bound on Blocking Probability of General Banyan-based Photonic Switches with Zero First-Order Switching-Element-Crosstalk 零一阶开关元件串扰的一般榕树光子开关阻塞概率下界

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554071

Chen Yu, Xiaohong Jiang, S. Horiguchi, M. Guo

{"title":"Lower-Bound on Blocking Probability of General Banyan-based Photonic Switches with Zero First-Order Switching-Element-Crosstalk","authors":"Chen Yu, Xiaohong Jiang, S. Horiguchi, M. Guo","doi":"10.1109/APCC.2005.1554071","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554071","url":null,"abstract":"The horizontally expanded and vertically stacked photonic banyan (HVPB) is a general architecture for building banyan-based photonic switches. Blocking behavior analysis is an effective approach to studying network performance and finding a graceful compromise among hardware cost, network depth, and blocking probability. In this paper, we analyze the blocking probability of a HVPB network under the constraint of zero first-order switching-element-crosstalk and develop its lower bound with respect to the number of planes (stacked copies) and number stages in the network. Extensive simulation on a network simulator with both random routing and packing strategy has shown that the blocking probabilities of both strategies are nicely bounded by our lower bound, and the blocking probability of packing strategy actually matches the lower-bound. The proposed lower-bound is significant because it provides network designers an effective tool to estimate the minimum blocking probability they can expect from a HVPB architecture regardless what kind of routing strategy to be adopted. In particular, the proposed bound can be used to efficiently estimate the blocking probability of HVPB networks adopting packing routing strategy, in which the inherent relationship and tradeoff among blocking probability, network hardware cost in terms of the number of planes, and network depth can be explored","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"18 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125909945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A Distributable Traffic - based MPLS Dynamic Load Balancing Scheme 一种基于可分配流量的MPLS动态负载均衡方案

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554149

Gang Yuan, Yunqing Chen, Yueming Wei, Shizhong Nie

引用次数: 5

Evaluation of a New Effective Antenna Height Definition in ITU-R Recommendation P. 1546-1 ITU-R建议P. 1546-1中新的有效天线高度定义的评估

2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554033

E. Ostlin, Hajime Suzuki, H. Zepernick

{"title":"Evaluation of a New Effective Antenna Height Definition in ITU-R Recommendation P. 1546-1","authors":"E. Ostlin, Hajime Suzuki, H. Zepernick","doi":"10.1109/APCC.2005.1554033","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554033","url":null,"abstract":"The International Telecommunication Union has recently developed a new recommendation on the method of point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3000 MHz. It supersedes well-known recommendations such as P.370 and P.529 (modified Okumura-Hata method) used mainly for broadcasting and mobile services, respectively. The recommendation serves as a standard in areas of spectrum management and radio technology and is constantly under development. The work is undertaken by the ITU-R Working Party 3K followed by an extensive international approval process. At the moment, P.1546-1 incorporates an effective antenna height concept similar to that in the Okumura model. It is well known that this definition for certain scenarios produces negative transmitting/base antenna height values leading to unrealistic prediction results. Therefore, a widely accepted alternative method is called for. In this paper, an effective antenna height definition that overcomes this problem is investigated. The prediction results are compared with measurement data obtained by utilising the IS-95 pilot signal of a commercial CDMA mobile network in rural Australia","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128978364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11